Does Blender have a Wayland backend?
Blender 2.90 includes an experimental Wayland backend when compiled with the corresponding flag. You can view which flags blender was compiled with when executing blender --version and you should be looking for WITH_GHOST_WAYLAND.
BTW you can easily test if an application is running under XWayland by starting xeyes and moving you mouse cursor above the window. If the eyes are still following the cursor the application uses XWayland